Hi - is this due to your recent update?
I have styles in tags like [unsubscribe] and [webversion] and these are not being correctly stripped out of the text version - i.e. [webversion style="color:#00f;text-decoration:underline;"] and [unsubscribe style="color:#1B963B; "]
You need to use the HTML version of these tags: <webversion> and <unsubscribe> in your HTML version, and then they should be ported over to plain-text properly.
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